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dc.contributor.authorSridhar, Navin
dc.contributor.authorChandra, Sunil
dc.contributor.authorBhattacharyya, Sudip
dc.contributor.authorAntia, H.M.
dc.date.accessioned2019-10-01T06:47:12Z
dc.date.available2019-10-01T06:47:12Z
dc.date.issued2019
dc.identifier.citationSridhar, N. et al. 2019. Broad-band reflection spectroscopy of MAXI J1535–571 using AstroSat: estimation of black hole mass and spin. Monthly notices of the Royal Astronomical Society, 487(3):4221-4229. [https://doi.org/10.1093/mnras/stz1476]en_US
dc.identifier.issn0035-8711
dc.identifier.issn1365-2966 (Online)
dc.identifier.urihttp://hdl.handle.net/10394/33375
dc.identifier.urihttps://academic.oup.com/mnras/article-pdf/487/3/4221/28856678/stz1476.pdf
dc.identifier.urihttps://doi.org/10.1093/mnras/stz1476
dc.description.abstractWe report the results from AstroSat observations of the transient Galactic black hole X-ray binary MAXI J1535–571 during its hard-intermediate state of the 2017 outburst. We systematically study the individual and joint spectra from two simultaneously observing AstroSat X-ray instruments, and probe and measure a number of parameter values of accretion disc, corona, and reflection from the disc in the system using models with generally increasing complexities. Using our broad-band (1.3–70 keV) X-ray spectrum, we clearly show that a soft X-ray instrument, which works below 10–12 keV, alone cannot correctly characterize the Comptonizing component from the corona, thus highlighting the importance of broad-band spectral analysis. By fitting the reflection spectrum with the latest version of the RELXILL family of relativistic reflection models, we constrain the black hole’s dimensionless spin parameter to be 0.67+0.16−0.04⁠. We also jointly use the reflection spectral component (RELXILL) and a general relativistic thin disc component (Kerrbb), and estimate the black hole’s mass and distance to be 10.39+0.61−0.62 M⊙ and 5.4+1.8−1.1 kpc, respectivelyen_US
dc.language.isoenen_US
dc.publisherOxford Univ Pressen_US
dc.subjectAccretionen_US
dc.subjectAccretion discsen_US
dc.subjectBlack hole physicsen_US
dc.subjectMethods: data analysisen_US
dc.subjectX-rays: binariesen_US
dc.titleBroad-band reflection spectroscopy of MAXI J1535-571 using AstroSat: estimation of black hole mass and spinen_US
dc.typeArticleen_US
dc.contributor.researchID31125417 - Chandra, Sunil


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